CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net loss	$ (174,456)	$ (139,881)	$ (46,140)
Other comprehensive income-unrealized gain on securities, net of taxes	33	8	21
Comprehensive loss	$ (174,423)	$ (139,873)	$ (46,119)